Dinosaur book suggestions

[ladycoreopsis]

I know this isn't a "classic" book request, but my four-year old is into dinosaurs now and I'd really appreciate some book suggestions. We would be interested in age-appropriate factual books as well as fictional stories.

Bonus points if it's anything about Maiasaura, the "good mother lizard."

Cross-posted to parenting101 and geekparents.